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Inchworm is a term used for different types of caterpillars that move by contracting and stretching out their bodies. They vary in size and color, but are usually some shade of green. Inchworms are also known as loopers, spanworms and canker worms, and are a member of the Geometridae family. Inchworm larvae eat tree leaves, and occasionally some flowers and vegetables, but you can control them without strong pesticides. Most inchworms hatch and begin to infest plants in late spring or early summer, so begin control methods as soon as you notice them to effectively reduce the population.

1

Spray all parts of infested plants, including the undersides of leaves, with Bacillus thuringiensis or spinosad until they're thoroughly saturated. Reapply it once a week until the inchworms are gone. Bt works best on inchworms that are less than 1 inch long.

2

Place sticky band insect traps around the trunks of trees to trap egg-laying moths and prevent future infestations. Position them 4 to 5 feet above the ground, following the label instructions depending on the product type. Apply these in the early spring for spring cankerworms or early fall for fall cankerworms.

3

Spray all parts of trees thoroughly with dormant horticultural oil during the egg stage before the larvae hatch in the early spring to prevent new infestations.

Things You Will Need

Bacillus thuringiensis

Spinosad

Sticky band insect traps

Dormant horticultural oil

Tips

Apply Bt spray on overcast days when rain isn't expected for the best results.

About the Author

Shelley Marie has been writing professionally since 2008 for online marketing and informational websites. Her areas of expertise include home, garden and health. She holds a Bachelor of Science in business administration and an associate degree in medical billing and insurance coding, both from Herzing University.